From mgirard@titech.ac.jp Tue Mar 21 00:58:40 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!titech!mgirard From: mgirard@titech.ac.jp (Mikhail Girard) Newsgroups: comp.sys.m68k Subject: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar21.005840.8805@titech.ac.jp> Date: Tue, 21 Mar 1995 00:58:40 GMT Organization: Tokyo Institute of Technology Computer Centre NNTP-Posting-Host: titech.ac.jp X-Newsreader: NewsWatcher 2.0b24 Lines: 11 Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. Disassembling ROM #0 reveals an initialization routine that checks for a hardware dongle marked 'ORION-ENC-84'. CPU #0 handles host bus interfacing and DMA, while CPU #1 is dedicated entirely to a 16-bit MAC (multiply-accumulate) unit. Schematic diagram in ASCII uploaded to ftp.ashford-poly.edu:/pub/telecom-archives/twin68_array.asc. -- Mikhail Girard SupraFAXModem 28.8 @ 19,200 bps "Tape doesn't lie at 02:14. Ears do." From psuzuki@berkeley.edu Wed Mar 22 08:54:40 1995 Path: ashpoly!cascade!brgate!saturno!berkeley!psuzuki From: psuzuki@berkeley.edu (Pavel Suzuki) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar22.085440.1665@berkeley.edu> Date: Wed, 22 Mar 1995 08:54:40 GMT References: <1995Mar21.005840.8805@titech.ac.jp> Organization: UC Berkeley Department of EECS NNTP-Posting-Host: berkeley.edu X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Mar21.005840.8805@titech.ac.jp>, mgirard@titech.ac.jp (Mikhail Girard) writes: > Looking at the bus architecture of the TWIN-68 board. Motorola engineers, please take a look. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Pavel Suzuki Tape trading list upon request. SASE required for international mail. From seriksson@tum.de Wed Mar 22 21:48:40 1995 Path: ashpoly!cascade!mxgate!coyoacan!tum!seriksson From: seriksson@tum.de (Sergei Eriksson) Newsgroups: comp.sys.m68k Subject: Re: [INFO] TWIN-68 Rev C coprocessor board - schematic analysis & EPROM dump Message-ID: <1995Mar22.214840.9976@tum.de> Date: Wed, 22 Mar 1995 21:48:40 GMT References: <1995Mar21.005840.8805@titech.ac.jp> <1995Mar22.085440.1665@berkeley.edu> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: Netscape 1.1N Lines: 8 In article <1995Mar22.085440.1665@berkeley.edu>, psuzuki@berkeley.edu (Pavel Suzuki) writes: > The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. The MAC unit looks like a precursor to the DSP56001 that Motorola put in the NeXT and Atari Falcon. -- Sergei Eriksson -- Technische Universität München "Do not worship the copy."